Piston-ring-filing device



PISTON RING FILING DEVICE Patented Jan. 22, 1 924.

UNITED STATES JOHN A. FLANDERS, 0F TAMPA, FLORIDA.

PISTON-'RING-FILING DEVICE.

Application filed May 31, 1923. Serial No. 642,535.

usual split thereof and which filing opera tion is resorted to for the purpose of effecting a proper fit of the rings. 7

It is the purpose of my present invention to provide a device of the character named through the instrumentality of which the terminals of piston rings can befilled with facility and speed, while at the same time accuracy of the work is assured, which latter element is of the utmost importance in such an operation.

It is my further purpose to provide a ,device of this character which is capable of adjustment, soas 'topermit its use in connection with the filing of piston rings of 'difierent sizes.

I will describe my invention in the best form known to me at present, but it will be understood that the same is susceptible to changes in forms and proportions and to desirable additions with the exercise of only ordinary mechanical skill and without departing from the scope of the appended claims.

In the drawings chosen to illustrate my invention Figure 1 is a perspective view of my invention showing a piston rin and file element in operative association t erewith;

Figure 2, a View similar to Figure 1 with one of the adjustable elements of the de vice removed; and

Figure 3, a longitudinal section of the device.

Referring to the drawings my invention is shown as comprising a piston ring support in the form of blocks A and B adjustably connected together by means of a tongue and groove 10 and 11, respectively, formed thereon. The block B is shorter than the block A and its inner end opposes the inner end of an upward extension 12 formed on block A. The inner end surfaces of the extension 12 and block B are parallel and disposed diagonally of the blocks,

.such disposition of said end surfaces corresponding to the disposition of the terminal surfaces of a piston ring formed by the "split thereof. In order to secure the block B in a desired adjustment, with respect to the block A, I mount upstandingly on the latter a screw 13 which projects through an. elongated slot 14 formed in the block B. A binding nut 15 operating 011 this screw is adapted to be moved against.

the block B to thereby clamp said blocks together against relative adjustment as will be obvious. In order to operatively support a piston ring to'be filed,I provide a recess Ov formed by mating portions 16 and 17 formed in the extension 12 and blocks B respectively said recess opening. through the top of the base structure and having a curved base 18 and parallel vertical side walls 19 and 20. 'These wallsi19 and 20 serve to hold a piston ring (shown at D in Figures 1 and 2) engaged in recess C against endwise movement, while the curved base '18 directly-supports and engages the curved face of said piston ring. In orderto operatively associate a filing element, shown 7 at E, with the base structure I provide the block A with a groove 21, one wall of which is common with the inner end of the extension 12. This groove receives the file element and is of such depth that a portionof the file element intersects the recess G and is therefore positioned to be operatively disposed between the terminals of the piston ring D formed by the split thereof.

In operation, with the various elements associated as shown in Figures 1 and 2, it will be apparent that it is only necessary for the workman to reciprocate the file element E and at the same time exert gentle pressure downward on the ring D. The exertion of this pressure against the rings will cause the curved base 18 of recess C to coast with the curved outer face of the ring and progressively urge the terminals of the ring against respective faces of the reciprocating file element. This operation is continued until the terminals of the ring are filed sufiiciently to bring the latter into proper fit.. The accuracy and harmony of the foregoing filing with respect to both terminals of the ring will be obvious.

I claim 1. In a piston ring filing device, a piston ring support, means for guiding a file element operating between the terminals of a piston ring supported thereby, and means coacting with such ring when the latter is pressed against the support to force the terminals thereof against respective faces of an operating file element, said means acting to maintain the alinement of the terminals of said ring with each other.

2. In a piston ring filing device, a base structure having a recess therein for receiving and supporting a piston ring and means for guiding a file element operating between the terminals of a piston ring engaged in said recess, said file guiding means being located intermediate the ends of said piston ring receiving recess whereby said recess acts to maintain the terminals of the ring in alinement when they are being filed.

3. In a piston ring filing device a base structure having a recess therein for receiving and sup-porting a piston ring, and means for guiding a file element operating between the terminals of a piston ring so received and supported, said recess having a wall eoacting with such piston ring, whenthe latter is pressed against the base structure, to force the terminals thereof against respective faces of an operating file element, and to maintain the alinement of said terminals'with each other.

4:. In a piston ring filing device, a base structure having a recess therein for receiving and supporting a piston ring, said base structure embodying slidabl y adjustable members each including a portion of said recesswhereby relative adjustment of the members will vary the effective extent of said recess in one direction, means for guiding a file element operating between the terminals of a piston ring engag red in said re cess, and means coacting with such ring when the latter is pressed against the base structure to force the terminals thereof "wall coacting with the curved face of such piston ring at both terminal portions thereof, when the ring 18 pressed against the base structure, to force the terminals thereof against respective faces of an operating file element.

6 In a piston ring filing device, a base structure having a recess therein opening through its upper side for receiving and supporting a piston ring, said recess having a curved base and parallel walls, the latter preventing endwise movement of an inserted piston ring, and the former coacting with the curved face of such ring, when the latter is pressed against the base structure, to force the terminals thereof together, and means to retain a file element slidably en'- gaged with said base structure intermediate the ends of said recess in position to operate between the terminals of] a piston ring inserted in said recess.

7. In a piston ring filingdevice, a piston ring support including relatively adjustable portions adapted to directly engage and support the curved face of a piston ring and coacting with said face, when such ring is pressed against said portions, to force the signature.

- JOHN A. FLANDERS. 

